In simple terms, you need torque to create tension in a bolt. You use torque to turn a nut onto a bolt and then to stretch the bolt, making it a solid spring that clamps the two materials together. Why do manufacturers use torque to yield bolts? Many vehicle manufacturersRead More →
The toilet bolts should not be overtightened, but they should be tight. If you hear the sound of metal on porcelain, stop tightening. But if you still feel the bolts tightening against the wax ring, keep going. How do you torque a flange? First to half torque and second toRead More →
The zinc coating of hot-dipped galvanized steel will last in the harshest soil is 35 to 50 years and in less corrosive soil 75 years or more. Although humidity affects corrosion, temperature itself has less of an impact. How long do galvanized bolts last? Hot-dip galvanized steel resists corrosion inRead More →
“Reuse: ASTM A490 bolts and galvanized ASTM A325 bolts shall not be reused. … ASTM A490 bolts and galvanized ASTM A325 bolts possess sufficient ductility to undergo one pretensioned installation, but are not consistently ductile enough to undergo a second pretensioned installation. Can torque to stretch fasteners be reused? Torque-to-yieldRead More →
Two of the major types of rivets used in the aircraft are the common solid shank type, which must be driven using a bucking bar, and the special (blind) rivets, which may be installed where it is impossible to use a bucking bar. Solid shank rivets are generally used inRead More →